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Made of a simple link plate and pin construction, steel leaf chains is identified by a number which refers to the lacing of the links and the pitch. The chains have particular features such as high tensile strength for each section area, that enables the design of smaller devices. There are B- and A+ type chains in this series and both the BL6 and AL6 Series contain the same pitch as RS60. Finally, these chains cannot be driven utilizing sprockets.
Comparably, in roller chains, all of the link plates have higher fatigue resistance due to the compressive stress of press fits, while in leaf chains, just two outer plates are press fit. The tensile strength of leaf chains is high and the maximum allowable tension is low. If handling leaf chains it is essential to consult the manufacturer's handbook to be able to ensure the safety factor is outlined and use safety guards always. It is a great idea to carry out utmost care and utilize extra safety guards in functions where the consequences of chain failure are severe.
Higher tensile strength is a direct correlation to the utilization of much more plates. In view of the fact that the use of more plates does not improve the utmost permissible tension directly, the number of plates could be restricted. The chains require regular lubrication as the pins link directly on the plates, producing an extremely high bearing pressure. Making use of a SAE 30 or 40 machine oil is normally advised for the majority of applications. If the chain is cycled more than one thousand times in a day or if the chain speed is more than 30m per minute, it would wear extremely fast, even with continual lubrication. Hence, in either of these situations using RS Roller Chains will be a lot more suitable.
AL type chains are just to be utilized under particular situations like for instance where there are no shock loads or if wear is not a big issue. Be sure that the number of cycles does not exceed one hundred every day. The BL-type will be better suited under other conditions.
If a chain using a lower safety factor is chosen then the stress load in parts would become higher. If chains are used with corrosive elements, then they could become fatigued and break quite easily. Performing regular maintenance is really vital if operating under these kinds of situations.
